Treadmill



FIG. 1 is a perspective view of a treadmill showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof, the side opposite being substantially a mirror image; and,

FIG. 6 is another side elevational view thereof showing the design in an alternate inclined position. 

The ornamental design for a treadmill, as shown and described. 